Storyline: Thor: Ragnarok (2017) Two years after the battle of Sokovia,[N 1] Thor is imprisoned by the fire demon Surtur in Muspelheim. Surtur reveals that Thor's father Odin is no longer on Asgard, and that the realm will soon be destroyed in the prophesied RagnarÃ¶k, once Surtur unites his crown with the Eternal Flame that burns in Odin's vault. Thor frees himself and defeats Surtur and takes his crown, believing he has prevented RagnarÃ¶k.Thor returns to Asgard to find Heimdall gone and his brother Loki posing as Odin. After exposing Loki, Thor forces him to help find their father, and with directions from Stephen Strange on Earth, they locate Odin in Norway. Odin explains that he is dying and RagnarÃ¶k is imminent despite Thorâ€™s efforts to prevent it. He then reveals his passing will allow his firstborn child, Hela, to escape from a prison she was sealed in long ago. Hela was the leader of Asgard's armies, conquering the Nine Realms with Odin, but Odin imprisoned her and wrote her out of history after he feared that she had become too ambitious and powerful. Odin then dies and Hela appears, destroying Thor's hammer Mjolnir. She pursues Thor and Loki as they attempt to flee through the BifrÃ¶st Bridge, forcing them out into space. Hela arrives in Asgard, defeating its army and killing the Warriors Three. She then resurrects the ancient dead who once fought with her, including her giant wolf Fenris, and appoints the Asgardian Skurge as her executioner. Hela plans to use the BifrÃ¶st to expand Asgard's empire, but Heimdall takes the sword that controls the Bridge and begins hiding other Asgardians....